Lead frame with leads projecting alternately from opposite sides

Details Lead frame with leads projecting alternately from opposite sides Lead frame with leads projecting alternately from opposite sides

1995-04-14

1995-11-14

Crane, Sara W.

Active solid-state devices (e.g., transistors, solid-state diode

Lead frame

257676, H01L 2348, H01L 2944, H01L 2952, H01L 2960

Patent

active

054669669

ABSTRACT:
The first step is forming belt-like resist films having a predetermined width on one and the other surfaces of a metal plate material alternately at a predetermined interval. The second step is etching the metal plate material from the one and other surfaces thereof to dissolve and remove portions of the metal plate material where the resist films are not formed, thereby forming a plurality of leads having a width corresponding to the resist films.

REFERENCES:
patent: 4711700 (1987-12-01), Cusak
patent: 4872260 (1985-10-01), Johnson et al.
patent: 5221428 (1993-06-01), Ohsawa et al.
patent: 5270570 (1993-12-01), Westerkamp

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